gudusoft.gsqlparser.resolver2.model

Class ColumnReference

Object

gudusoft.gsqlparser.resolver2.model.ColumnReference

public class ColumnReference
extends Object

Column reference record - preserves original AST node information for traceability.

When multiple syntactically different identifiers refer to the same semantic column (e.g., "Column1" and column1 in Oracle), this class allows tracing back from the normalized column name to all original occurrences in the SQL text.

Example: For SQL SELECT "Column1", column1 FROM dual:

• Both references resolve to the same column COLUMN1
• Each creates a separate ColumnReference with its original text and position
• The ColumnSourceWithReferences holds both references

Since:

3.1.0.9

Constructor Summary

Constructors

Constructor and Description
ColumnReference(TObjectName objectName) Create a column reference from a TObjectName AST node.
ColumnReference(TObjectName objectName, String originalText, int startOffset, int endOffset, int lineNumber, int columnNumber) Create a column reference with explicit values (for testing or special cases).

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getColumnNumber() Get the column number.
int	getEndOffset() Get the end offset in the SQL text.
int	getLineNumber() Get the line number.
TObjectName	getObjectName() Get the original AST node.
String	getOriginalText() Get the original text as it appears in SQL.
int	getStartOffset() Get the start offset in the SQL text.
int	hashCode()
boolean	hasPositionInfo() Check if position information is available.
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ColumnReference

public ColumnReference(TObjectName objectName)

Create a column reference from a TObjectName AST node.

Parameters:

objectName - the original AST node

ColumnReference

public ColumnReference(TObjectName objectName,
                       String originalText,
                       int startOffset,
                       int endOffset,
                       int lineNumber,
                       int columnNumber)

Create a column reference with explicit values (for testing or special cases).

Parameters:

objectName - the original AST node (may be null)

originalText - the original text

startOffset - start offset

endOffset - end offset

lineNumber - line number

columnNumber - column number

Method Detail

getObjectName

public TObjectName getObjectName()

Get the original AST node.

Returns:

the TObjectName node, or null if not available

getOriginalText

public String getOriginalText()

Get the original text as it appears in SQL.

Returns:

original text (e.g., "Column1" with quotes, or column1 without)

getStartOffset

public int getStartOffset()

Get the start offset in the SQL text.

Returns:

start offset (0-based), or -1 if not available

getEndOffset

public int getEndOffset()

Get the end offset in the SQL text.

Returns:

end offset (0-based, exclusive), or -1 if not available

getLineNumber

public int getLineNumber()

Get the line number.

Returns:

line number (1-based), or -1 if not available

getColumnNumber

public int getColumnNumber()

Get the column number.

Returns:

column number (1-based), or -1 if not available

hasPositionInfo

public boolean hasPositionInfo()

Check if position information is available.

Returns:

true if position information is valid

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object